The Role of Quadriceps Contraction in Patellar Repositioning - a Computed Tomography Study

October 23, 2008 updated by: National Taiwan University Hospital

The Role of Quadriceps Contraction in Patellar Repositioning-a Computed Tomography Study

Background Previous studies have a great discrepancy concerning the effects of quadriceps contraction on patellar lateral displacement and tilt in patients with patellofemoral pain syndrome. This discrepancy may be caused by lack of information regarding to classifications of patellofemoral alignment under quadriceps relaxed. We hypothesized quadriceps contraction has different effects on each type of patellofemoral malalignment.

Methods The investigators expect to recruit 150 subjects with patellofemoral pain syndrome to participate in this study. All patients underwent computed tomography imaging of symptomatic knees, with and without quadriceps muscle contraction in 0°, 15° and 30° of knee flexion. Patellar lateral condyle index and patellar tilt angles of Sasaki and modified Fulkerson were measured to investigate the effect of quadriceps contraction on patellar repositioning.

Study Overview

Status

Unknown

Conditions

Intervention / Treatment

Detailed Description

Background Previous studies have a great discrepancy concerning the effects of quadriceps contraction on patellar lateral displacement and tilt in patients with patellofemoral pain syndrome. This discrepancy may be caused by lack of information regarding to classifications of patellofemoral alignment under quadriceps relaxed. We hypothesized quadriceps contraction has different effects on each type of patellofemoral malalignment.

We expect to recruit 150 subjects with patellofemoral pain syndrome to participate in this study. All patients underwent computed tomography imaging of symptomatic knees, with and without quadriceps muscle contraction in 0°, 15° and 30° of knee flexion. Patellar lateral condyle index and patellar tilt angles of Sasaki and modified Fulkerson were measured to investigate the effect of quadriceps contraction on patellar repositioning.

Study Type

Observational

Enrollment (Anticipated)

150

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Taiwan
      • Taipei, Taiwan, 100
        • Recruiting
        • Mei-Hwa Jan
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

20 years to 50 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Probability Sample

Study Population

Patients with patellofemoral pain.

Description

Inclusion Criteria:

  • The inclusion criteria for patients with PFPS were suffering from pain with at least two kinds of knee-flexing activities such as:

    • sitting
    • getting up from sitting
    • walking upstairs or downstairs
    • squatting
    • getting up from squatting
    • running
    • kneeling
    • jumping

Exclusion Criteria:

The exclusion criteria included:

  • The presence of any major medical disease
  • Rheumatoid arthritis, gouty arthritis
  • Recent history (within 3 months) of knee surgery
  • Image findings of osteoarthritis
  • Any deformity of lower limbs

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

National Taiwan University Hospital

Investigators

  • Study Director: Mai-Hwa Jan, MS, Graduate institute of physical therapy

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

August 1, 2006

Study Completion (Anticipated)

July 1, 2009

Study Registration Dates

First Submitted

April 10, 2007

First Submitted That Met QC Criteria

September 25, 2008

First Posted (Estimate)

September 26, 2008

Study Record Updates

Last Update Posted (Estimate)

October 24, 2008

Last Update Submitted That Met QC Criteria

October 23, 2008

Last Verified

September 1, 2008

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 9461712133

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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